Suppose that 20,000 married adults in a country were randomly surveyed as to the number of children they have. The results are compiled and are used as theoretical probabilities. Let X = the number of children married people have. x P(x) xP(x) 0 0.10 1 0.20 2 0.35 3 4 0.10 5 0.05 6 (or more) 0.05 (a) Find the probability that a married adult has three children. (Enter your answer to two decimal places.) (b) In words, what does the expected value in this example represent? a. the average number of children married adults in the country have b. the average number of children adults in the country have c. the number of children married adults in the country have d. the number of children adults in the country have
Suppose that 20,000 married adults in a country were randomly surveyed as to the number of children they have. The results are compiled and are used as theoretical probabilities. Let X = the number of children married people have. x P(x) xP(x) 0 0.10 1 0.20 2 0.35 3 4 0.10 5 0.05 6 (or more) 0.05 (a) Find the probability that a married adult has three children. (Enter your answer to two decimal places.) (b) In words, what does the expected value in this example represent? a. the average number of children married adults in the country have b. the average number of children adults in the country have c. the number of children married adults in the country have d. the number of children adults in the country have
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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Suppose that 20,000 married adults in a country were randomly surveyed as to the number of children they have. The results are compiled and are used as theoretical probabilities. Let X = the number of children married people have.
x | P(x) | xP(x) |
---|---|---|
0 | 0.10 | |
1 | 0.20 | |
2 | 0.35 | |
3 | ||
4 | 0.10 | |
5 | 0.05 | |
6 (or more) | 0.05 |
(a) Find the probability that a married adult has three children. (Enter your answer to two decimal places.)
(b) In words, what does the
a. the average number of children married adults in the country have
b. the average number of children adults in the country have
c. the number of children married adults in the country have
d. the number of children adults in the country have
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